user
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Explain why the situation changed.

### Input:
Situation: Recently the amount of rainfall has decreased in a certain region.

### Response:
assistant
The amount of rainfall in a certain region has recently decreased due to changes in the atmosphere, such as higher temperatures, higher levels of carbon dioxide, and lower levels of humidity, which can reduce a region's ability to hold moisture.